None have entered yet
Per politics1.com
1.Karen Bass, D, California
2.Xavier Becerra, D California
3.Raul Ruiz, D, California
4.Loretta Sanchez, D, California
5.Jackie Speier, D, California
6.Ed Royce, R, California
Of the Californians, Loretta is the only one I could actually see launching a campaign. Becerra will knock the idea around publicly for a while before ultimately declining and returning to the House. I could see him as Speaker in the 2020's. Royce will never engage in such a hopeless and pointless endeavor. Bass already declined. Ruiz and Speier are too low on the totem pole.